aa meaning

UK US

aa (noun): a dry form of lava resembling clinkers.

aa has 3 meanings in this dictionary.

aa as a noun

  1. a dry form of lava resembling clinkers

    Type of: lava

  2. an international organization that provides a support group for persons trying to overcome alcoholism

    Synonyms: Alcoholics Anonymous

    Type of: nongovernmental organization

  3. an associate degree in arts

    Synonyms: Associate in Arts

    Type of: associate degree

More about aa on Wikipedia.